CN106340943B - A kind of equalizing control circuit for two-way power module output-parallel - Google Patents
A kind of equalizing control circuit for two-way power module output-parallel Download PDFInfo
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- CN106340943B CN106340943B CN201610816195.6A CN201610816195A CN106340943B CN 106340943 B CN106340943 B CN 106340943B CN 201610816195 A CN201610816195 A CN 201610816195A CN 106340943 B CN106340943 B CN 106340943B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
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Abstract
A kind of equalizing control circuit for two-way power module output-parallel, including resistance RC1, resistance RCj, resistance R1, resistance R1A, resistance Rj, resistance RjA, output capacitance CO, linear voltage regulator A1, linear voltage regulator Aj, input power Vin1, input power Vin2, input power Vin3、…、VinNFor the road N voltage to be equalized, when Aj output electric current increaseds or decreases, the feedback voltage of feedback to Aj are corresponding in equalizing control circuit of the present invention increases or reduces, Aj increases internal adjustment tube impedance, make the output voltage Vout of Aj is corresponding to reduce or increase, so as to adjust the output electric current of Aj, until the output electric current for restoring each output branch is equal.The present invention exports electric current to it and has carried out dilatation, linear voltage regulator is made to can be applied to High-current output occasion on the basis of guaranteeing multiple output converter output voltage stabilization degree, has good applied value.
Description
Technical field
The present invention relates to a kind of sharing control technology, especially a kind of equal flow control for two-way power module output-parallel
Circuit processed.
Background technique
In order to adapt to various integrated circuit voltage requirements, existing integrated circuit system need to have it is a variety of not
Same voltage output can design DC converter all the way for the demand for every road output voltage, but the program can be led
Cause power supply line's increased costs, volume increase, loss increase, cannot achieve product miniaturization and efficient design requirement,
Therefore generalling use multiple-channel output DC converter in the design of integrated circuit route reduces product cost, volume and damage
Consumption.
The multiple output converter principle directly proportional to umber of turn according to the output voltage of each winding of transformer, will be each
The output winding technique of road voltage, by adjusting the number of turns of each winding, can obtain different output electricity in same magnetic core
Pressure.Due to inevitably there is leakage inductance between winding during transformer winding, cause the output voltage of each winding by
Leakage inductance influences, and each road output voltage is no longer directly proportional to umber of turn, it cannot be guaranteed that the stability of output voltage meets integrated electricity
The requirement on road.
To solve the problems, such as multiple output converter output voltage by load effect, each road output voltage usually increases level-one line
Property voltage-stablizer carry out secondary adjustment.But it is constrained to the rated operational current of linear voltage regulator, for needing larger operating current
Application, single linear voltage regulator, which carries out secondary adjustment, can not adapt to the demand of larger operating current.To solve above-mentioned line
Property voltage-stablizer rated operational current limitation, can by by multiple linear voltage regulator parallel connections increase output electric current ability, but
Be the parallel connection increase output electric current application scenarios under need guarantee flow through each linear voltage regulator electric current it is identical, to avoid
The operating circuit of partial linear voltage-stablizer as caused by current-unbalance exceeds component rated operational current, needs to set
Count a kind of succinct effective output electric current equalizing control circuit.
Summary of the invention
Technical problem solved by the present invention is having overcome the deficiencies of the prior art and provide a kind of for two-way power module
The equalizing control circuit of output-parallel when solving linear voltage regulator parallel connection and increasing output electric current and be applicable in ability, flows through in parallel
Multiple linear voltage regulator current-unbalances cause the operating current of partial linear voltage-stablizer beyond component rated operational current
Problem.
The technical solution of the invention is as follows: a kind of equalizing control circuit for two-way power module output-parallel, packet
Include resistance RC1, resistance RCj, resistance R1, resistance R1A, resistance Rj, resistance RjA, output capacitance CO, it is linear voltage regulator A1, linear
Voltage-stablizer Aj, input power Vin1, input power Vin2, input power Vin3、…、VinNFor the road N voltage to be equalized, wherein
Input power Vin1High potential meet input voltage the pin Vin, V of linear voltage regulator A1in1Low potential connect sampling
The one end resistance Rc1, the output voltage pin Vout of linear voltage regulator A1 connect the one end output filter capacitor Co, load one end Ro, line
Property voltage-stablizer A1 ground wire GND, Rc1 another terminating load Ro of the other end, output filter capacitor Co the other end, voltage adjustment
Ring acquires the output electricity of output voltage the pin Vout, another terminated line voltage-stablizer A1 of mono- terminated line voltage-stablizer A1 of resistance R1
Press adjustment end ADJ, the one end resistance R1A, the control signal ground GND of another terminated line voltage-stablizer A1 of resistance R1A；
Input power VinjHigh potential meet input voltage the pin Vin, V of linear voltage regulator AjinjLow potential connect sampling
The one end resistance Rcj, the output voltage pin Vout of linear voltage regulator Aj connect the one end output filter capacitor Co, load one end Ro, line
The control signal ground GND of property voltage-stablizer Aj connects one end of RCj, input power VinjLow potential, RCj another termination output
The capacitor Co other end, the load Ro other end, electric current flow equalizing ring acquire resistance Rj mono- and terminate the one end output filter capacitor Co, the other end
Connect output voltage adjustment end ADJ, the one end resistance RjA of linear voltage regulator Aj, another termination sampling resistor Rc1 mono- of resistance RjA
End, the one end output filter capacitor Co export the high voltage end of equalizing voltage, and the other end exports the low-voltage end of equalizing voltage,
In, j=2,3,4 ... N, N are the positive integer not less than 2, and Ro is the equivalent resistance of load.
The RC1 uses 4 RMK3216-1/4W-1 Ω resistor coupled in parallel, and RCj is using 4 RMK3216-1/4W-1 Ω electricity
Resistance is in parallel, and R1A is RMK2012-1/10W-1k Ω, and RjA is RMK2012-1/10W-1k Ω.
Described linear voltage regulator A1, the A2 uses LM2941.
The capacitor Co uses CAK45C-25V-47uF.
The advantages of the present invention over the prior art are that:
(1) equalizing control circuit of the present invention compared with prior art, by combining linear voltage regulator parallel technology, realizes
The secondary adjustment of multiple output converter exports it on the basis of guaranteeing multiple output converter output voltage stabilization degree
Electric current has carried out dilatation, and linear voltage regulator is made to can be applied to High-current output occasion；
(2) equalizing control circuit of the present invention is compared with prior art, additional without increasing only by increasing sampling resistor RC
Integrated circuit just realizes the parallel current-sharing of linear voltage regulator, has the advantages that simple in circuits, at low cost, small in size；
(3) equalizing control circuit of the present invention is compared with prior art, anti-by increasing sampling resistor, change linear voltage regulator
The connection type for presenting loop, solves the problems, such as that linear voltage regulator output-parallel flows, and has realization simple, high reliablity excellent
Point；
(4) equalizing control circuit of the present invention is by double -loop control, while realizing parallel current-sharing, it is ensured that output is electric
It is pressed in stability all with higher under different application operating condition.
Detailed description of the invention
Fig. 1 is a kind of equalizing control circuit structural schematic diagram for two-way power module output-parallel of the present invention；
Fig. 2 is the equalizing control circuit structural schematic diagram that the present invention is applied to multiple power supplies module output-parallel.
Specific embodiment
In view of the deficiencies of the prior art, the present invention proposes a kind of sharing control electricity for two-way power module output-parallel
Road, equalizing control circuit of the present invention realize the secondary tune of multiple output converter by combining linear voltage regulator parallel technology
It is whole, on the basis of guaranteeing multiple output converter output voltage stabilization degree, electric current is exported to it and has carried out dilatation, make linear steady
Depressor can be applied to High-current output occasion, be described further with reference to the accompanying drawing to the present invention.
It is as shown in Figure 1 a kind of equalizing control circuit structural schematic diagram for two-way power module output-parallel, including
Resistance RC1, resistance RC2, resistance R1, resistance R1A, resistance R2, resistance R2A, output capacitance CO, it is linear voltage regulator A1, linear steady
Depressor A2, wherein the pin definitions of linear voltage regulator A1, A2 in the present invention are as follows: Vin- input voltage pin, Vout- output electricity
Pin, ADJ- output voltage adjustment end are pressed, GND- controls signal ground.
Input power Vin1, input power Vin2For the voltage to be equalized of two-way power module output, input power Vin1For
The input voltage of linear voltage regulator A1, Vin1High potential and A1 the Vin connection of input voltage pin, Vin1Low potential and sampling
The connection of the one end resistance Rc1, the one end output voltage pin Vout connection output filter capacitor Co, load one end Ro of A1, the ground of A1
The other end, the output filter capacitor Co other end of line GND, Rc1 are connected with the other end of load Ro, and voltage adjustment ring acquires resistance
The one end R1 connects the output voltage pin Vout of A1, and the other end connects the output voltage adjustment end ADJ of A1, the one end resistance R1A, electricity
Hinder the control signal ground GND of R1A other end connection A1.
Input power Vin2For the input voltage of linear voltage regulator A2, Vin2High potential and A2 input voltage pin Vin
Connection, Vin2Low potential connect with the one end sampling resistor Rc2, the output voltage pin Vout connection output filter capacitor Co of A2
One end, load one end Ro, one end of control the signal ground GND and Rc2 of A2, input power Vin2Low potential connection, RC2's
The other end is connect with the output capacitance Co other end, the load Ro other end, and electric current flow equalizing ring acquisition resistance R2 connects output filter capacitor
The one end Co, the other end connect the output voltage adjustment end ADJ of A2, the one end resistance R2A, the resistance R2A other end and sampling resistor Rc1
One end connection, the one end output filter capacitor Co export the high voltage end of equalizing voltage, and the other end exports the low-voltage of equalizing voltage
End.
After equalizing circuit of the present invention powers on, by output voltage adjust loop network in voltage adjustment ring acquire resistance R1,
Resistance R1A and linear voltage regulator A1 adjusts output voltage to the output voltage index V of external demandO
Wherein, VrefFor linear voltage regulator A1 internal reference voltage.
The present invention makes by adjusting the dividing ratios of the electric current flow equalizing ring acquisition resistance R2 and resistance R2A in flow equalizing ring network
The electric current i of linear voltage regulator A1 outputo1With the electric current i of linear voltage regulator A2 outputo2It is equal, the adjustment end voltage V of A2fFor
Wherein, IOFor the output electric current of output voltage, RcFor current sampling resistor resistance value.
It is available according to above formula, when certain reason causes A2 output electric current io2 to increase suddenly, adjust flow equalizing ring network
The feedback voltage for feeding back A2 output voltage adjustment end ADJ increases, and A2 increases internal adjustment tube impedance, makes the output voltage of A2
Vout reduces, and reduces so as to adjust the output electric current io2 of A2, until two output branches output electric currents of recovery are equal, i.e., A1 is defeated
Electric current i outo1With the electric current i of A2 outputo2It is equal；When certain reason causes A2 output electric current io2 to reduce suddenly, adjustment is equal
The feedback voltage for flowing looped network road feedback to A2 output voltage adjustment end ADJ reduces, and A2 reduces internal negative justification tube impedance, makes A2's
Output voltage Vout increases, and increases so as to adjust the output electric current io2 of A2, until restoring two output branches exports electric current phase
Deng the electric current i of i.e. A1 outputo1With the electric current i of A2 outputo2It is equal.
Explanation is further explained to equalizing circuit of the present invention below with reference to embodiment, wherein RC1 uses 4
RMK3216-1/4W-1 Ω resistor coupled in parallel, RC2 use 4 RMK3216-1/4W-1 Ω resistor coupled in parallel, and A1 uses LM2941, A2 to make
Using CAK45C-25V-47uF, Ro with LM2941, Co is load equivalent resistance, and R1 is set according to output voltage demand,
R1A is RMK2012-1/10W-1k Ω, and R2 is set according to product test, and R2A is RMK2012-1/10W-1k Ω.
Bulk trial is carried out it can be found that when load current is by above-described embodiment to equalizing circuit of the present invention
When 0.1A, the electric current Io1 for flowing through linear voltage regulator A1 is 0.06227A, and the electric current Io2 for flowing through linear voltage regulator A2 is
0.0615A, output voltage Vo stablize in 12.504V；When load current is 1A, the electric current Io1 for flowing through linear voltage regulator A1 is
0.525A, the electric current Io2 for flowing through linear voltage regulator A2 is 0.538A, and output voltage Vo stablizes in 12.461V.Pass through above-mentioned implementation
Example verifying can show that equalizing circuit of the present invention effectively realizes on the basis of guaranteeing that output voltage has compared with high stability
Two-way linear voltage regulator output-parallel flow equalizing function, stream effect are obvious.
It is illustrated in figure 2 the implementation method for the output-parallel that the present invention is applied to more than 3 road power modules: input power
VinjFor the input voltage of linear voltage regulator Aj, VinjHigh potential and Aj the Vin connection of input voltage pin, VinjLow potential
It is connect with the one end sampling resistor Rcj, the one end output voltage pin Vout connection output filter capacitor Co, load one end Ro of Aj,
One end of control the signal ground GND and Rcj of Aj, input power VinjLow potential connection, the other end and output capacitance of RCj
The Co other end, load Ro other end connection, electric current flow equalizing ring acquisition resistance Rj connect the one end output filter capacitor Co, other end connection
The output voltage adjustment end ADJ of Aj, the one end resistance RjA, the resistance RjA other end are connect with the one end sampling resistor Rcj, output filtering
The one end capacitor Co exports the high voltage end of equalizing voltage, and the other end exports the low-voltage end of equalizing voltage.It is equal by adjusting electric current
The resistance value ratio for flowing ring acquisition resistance Rj and RjA realizes the sharing control of jth road power module and other power modules.
The content that description in the present invention is not described in detail belongs to the well-known technique of those skilled in the art.
Claims (1)
1. a kind of equalizing control circuit for two-way power module output-parallel, it is characterised in that including sampling resistor RC1, adopt
Sample resistance RCj, voltage adjustment ring acquisition resistance R1, resistance R1A, electric current flow equalizing ring acquisition resistance Rj, electric current flow equalizing ring acquisition electricity
Hinder RjA, output filter capacitor CO, linear voltage regulator A1, linear voltage regulator Aj, input power Vin1, input power Vin2, input electricity
Source Vin3、…、VinNFor the road N voltage to be equalized, wherein
Input power Vin1High potential meet input voltage the pin Vin, V of linear voltage regulator A1in1Low potential connect sampling resistor
The one end RC1, the output voltage pin Vout of linear voltage regulator A1 connects the one end output filter capacitor Co, load one end Ro, linear steady
The other end of another terminating load Ro of the ground wire GND of depressor A1, the other end of sampling resistor RC1, output filter capacitor Co, voltage
Adjustment ring acquires the output voltage pin Vout of mono- terminated line voltage-stablizer A1 of resistance R1, and another terminated line voltage-stablizer A1's is defeated
Voltage adjustment end ADJ, the one end resistance R1A out, the ground wire GND of another terminated line voltage-stablizer A1 of resistance R1A；
Input power VinjHigh potential meet input voltage the pin Vin, V of linear voltage regulator AjinjLow potential connect sampling resistor
The one end RCj, the output voltage pin Vout of linear voltage regulator Aj connects the one end output filter capacitor Co, load one end Ro, linear steady
The control signal ground GND of depressor Aj connects one end of sampling resistor RCj, input power VinjLow potential, sampling resistor RCj's
Another termination output filter capacitor Co other end, the load Ro other end, electric current flow equalizing ring acquire the termination output filtering of resistance Rj mono-
The one end capacitor Co, the other end connect the output voltage adjustment end ADJ of linear voltage regulator Aj, the one end resistance RjA, and resistance RjA is another
The one end sampling resistor RC1 is terminated, the one end output filter capacitor Co exports the high voltage end of equalizing voltage, the balanced electricity of other end output
The low-voltage end of pressure, wherein j=2,3,4 ... N, N are the positive integer not less than 2, and Ro is the equivalent resistance of load.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610816195.6A CN106340943B (en) | 2016-09-09 | 2016-09-09 | A kind of equalizing control circuit for two-way power module output-parallel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610816195.6A CN106340943B (en) | 2016-09-09 | 2016-09-09 | A kind of equalizing control circuit for two-way power module output-parallel |
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| CN106340943A CN106340943A (en) | 2017-01-18 |
| CN106340943B true CN106340943B (en) | 2019-05-24 |
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| CN111309089B (en) * | 2020-04-21 | 2022-05-10 | 深圳市鼎阳科技股份有限公司 | Linear voltage-stabilized power supply |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2854891Y (en) * | 2005-09-19 | 2007-01-03 | 珠海泰坦科技股份有限公司 | Flow equlization circuit of DC switch power supply |
| CN101344794A (en) * | 2007-07-13 | 2009-01-14 | 凌特公司 | Paralleling voltage regulators |
| CN102064592A (en) * | 2011-01-21 | 2011-05-18 | 深圳市皓文电子有限公司 | High-power battery device |
| CN102577020A (en) * | 2009-07-31 | 2012-07-11 | 热之王公司 | Bi-directional battery voltage converter |
-
2016
- 2016-09-09 CN CN201610816195.6A patent/CN106340943B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2854891Y (en) * | 2005-09-19 | 2007-01-03 | 珠海泰坦科技股份有限公司 | Flow equlization circuit of DC switch power supply |
| CN101344794A (en) * | 2007-07-13 | 2009-01-14 | 凌特公司 | Paralleling voltage regulators |
| CN102577020A (en) * | 2009-07-31 | 2012-07-11 | 热之王公司 | Bi-directional battery voltage converter |
| CN102064592A (en) * | 2011-01-21 | 2011-05-18 | 深圳市皓文电子有限公司 | High-power battery device |
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